I was replying to your impression that no bodies/mummies have ever been found in pyramids.

What do you propose they were instead?

Not a calculated guess, but a theory supported by evidence from both the archaeological and textual record.

There is no question that the step pyramid was built by Djoser, a third dynasty pharaoh and that the Giza pyramids were built by three pharaohs from the fourth dynasty. We absolutely know how old the pyramids are, the order that they were built in, and by whom.

The burial of Neferuptah was found intact inside her pyramid at Hawara.

There is no such debate. There is a very well established chronology of pyramid development from Mastaba tombs to the Step Pyramid of Djoser, to the Giza pyramids and so on.